The research aims to identify the impact of information systems in achieving the competitive advantage of government banks in the Sultanate of Oman. The importance of the research lies in the fact that banks’ use of information systems enables subscribers to obtain the required services, which leads to their feeling of satisfaction and thus reflects positively on the banks to achieve a competitive advantage. The research relied on the descriptive analytical approach, as the opinions of a sample of (40) individuals were surveyed Information technology department in various their levels by distributing a questionnaire consisting of paragraphs distributed in two areas (information systems and competitive advantage). The research reached a set of conclusions, including the availability of the necessary hardware and software required for operation and an integrated database within banks that contribute to decision support processes to solve problems, in addition to the role of information systems in enhancing the competitive advantage of banks. The research also recommended focusing more on providing training programs for working individuals. Banks in line with modern technological developments and activating the two dimensions of cost and creativity more in order to achieve the competitive advantage of the banks investigated.
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